I found this interesting post by Michael Beck (digitalnomad) of Rugged Notebooks.
Military and industrial interests are always looking for ways to leverage technology, and these mini-tablets might be the answer. For a light infantry soldier or a company field worker, someone who might have to "hump" in challenging climates (heat, humidity, etc), weight and durability do count. When I served, I had what was considered ruggedized communication devices in my rucksack and I often felt like a "beast of burden.”
I wouldn’t have minded carrying a more “soldier friendly” communication device like the one shown to the left.